Federal has six different gauges of shotshells available for hunters and target shooters: 10, 12, 16, 20, 28 and .410. Their lengths and shot charges vary from the 2-1/2 inch, 1/2 oz., .410 to the 3-1/2 inch, 2-1/4 oz. 10-gauge.
They are loaded with lead bird shot, buckshot, steel and two tungsten-based shot types. Some of these loads have a granulated plastic buffer which prevents pellet deformation and produces tight, uniform patterns.